Finding the Fourth Proportional to 2,310.69, 3,188.89 and 1,316.28

Step by Step Solution

1. Step 1: Write the proportion equation
   2,310.69 : 3,188.89 = 1,316.28 : x
2. Step 2: Convert to fraction form
   2,310.69/3,188.89 = 1,316.28/x
3. Step 3: Cross multiply
   2,310.69x = 3,188.89 × 1,316.28
4. Step 4: Simplify right side
   2,310.69x = 4,197,478.33
5. Step 5: Solve for x
   x = 4,197,478.33/2,310.69
6. Step 6: Final answer
   x = 1,816.54